Good job on looking to start investing and working while studying - it's tough!
Here are my thoughts:
As you may have noticed many people saying, dividend investing is a strategy that is most effective when you have a large enough capital. This is because dividend payouts are small (<=5%) and if you only invest a small amount, the passive income you generate will not be a lot.
This is why many young people choose to focus on growth first, ie by investing in low cost ETFs that are diversified, in order to grow their capital by compound interest, and then start dividend investing when they have larger capital at their disposal.
Nonetheless, there's nothing wrong with choosing to invest in dividend stocks. I believe that investing as early as you can is always the best, because time will be on your side.
All you need is a brokerage account to get started - Tiger Brokers is a popular choice due to its low fees.